Weaving loom



14, 1936. R HRDlNA WEAVIIENG LOOM Fiied April 1;, 1934 Patented n. 14, .1936 I j 2,027,776 f I UNITED STATES, PATENT Application April 13,1934, Serial No."l20,501

' In Czechoslovakia April 20, 1933 8 Claims. (01. 139-4231) V This invention relates to a device for automatican be pushed back into the supply box along a cally changing the weft spools of mechanical track separate from the mam track for the spools.

weaving looms. v The invention-is illustrated in the accompany- Devices for automatically changing the weft ing drawing, in which o spools are known inthe most varied construc- Figure 1 is a view inv side elevation of a device 5 tional forms. In one arrangement the hammer constructed in accordance with the invention. or supplying, device for the weft spec] is mounted Figure 2 a-view' thereof in rear elevation, rigidly andthe spool supply box rotatablyyor on Figure 3 a plan view, i Y the other hand, the hammer can be movable and j Figure 4 shows schematically the hammer and the spool supply box fixed. Such devices are very the push-rod for actuating the hammer, part of 0 delicate and are easily damaged, if for example the mechanism being omitted for the sake of a foreign body comes between the frame and g e te c e n l supply box in the-neighborhood of the spool box Figure 5 shows in side elevation the spool supor if the driver sticks. Further, devices are also ply reservoir alone and- I 1 known, in which the hammer as well as the spool Fi ure 6 shows h telescopic p hd on an 15 supply box are rotated by the frame and the deenlarged scale. j vices of this kind have the disadvantage that In the drawing I isthe frame, 2 the shuttle when the shuttle does not exactly fill its correct and. 3 the push-rod which, as shown in Figure 6, position for the spool-changing operation, the consists of the rod 3, which has a slot 4, and the :0 shuttle and possibly the whole spool-changing piston-like part 5 which moves axially in the rod '20 device is damaged by the hammer, which presses 3, the piston 5 being continuously pressed outon the frame. Finally, devices are known in wardlyby the spring 6. The piston 5 is prewhich particularly long shuttles of a kind not vented from being forcedout of the rod 3 bya usually employed are used which have a continstop-screw 1, the head of which moves in the slot 23 uous slot, intowhich a tongue engages; which by 4. The piston 5 carries at its outer end a key- 25 means of its wedge-shaped inclined side surfaces bolt 8, the length of which can be adjusted'by moves the shuttle into the correct position for the means of suitably co-operating screw-threads and spool-changing operation. If the tongue does not nuts.. On the piston 5 is 3150 pivoteda p w 9.- flnd its way into theslot in the shuttle but conwhich enters a recess ID, as soon as the key-bolt 3o tacts with a full side wall of the shuttle, then the I 8 passes through a corresponding aperture or keyhammer is rendered inoperative by a complicated way 12 in the shuttle 2 and the stop II of the lever transmission. This device has the disadframe I rotates thepawl 9, when a lever l3, which vantage that special shuttles must be used and is actuated by the weft director in a known manthe same require a complicated lever system ner, lifts the push-rod 3 into the operative posiwhich. also can bethe cause of disturbances in ti n, The push-rod then rotates the arm of 35 Operation the hammer l5, which is rotatable around a shaft The Present invention relates to a device for IS. The shaft l6 itself is rigidly mounted in a autoxPaticauy Phanging the weft spools of bracket 36. The hammer l5 presses a new spool chanical weaving looms, which does not exhibit into the shuttle 2 the empty Spool falling through 40 40 the disadvantages of the known devices, which the opening n out of the frame (Fig Upon is extremely simple in construction and permits the use of normal shuttles. The principal feature of the invention consists in that the ush- I rod actuating the hammer is telescopic, on; part rest posmon' as retaresented m Flgure and the ofthe rod carrying a pawl, which prevents telelever m m fiownwa'rdsi as a new weft 45 scoping of push'qods, when. the f o t part thread comes into action. The push-rod 3 turns of the push-rod enters a corresponding bore in downwards and remams m the pqsitlon shown the shuttle. The pawl does not operate when the in Figure 1 until it is again I it 5.1101116 shuttle does not take up the correct position in be again lifted andthe shuttle 2 does net-lie c so the shuttle box, in which case the push-rod is rectly in theshllttle bOX, y bolt 3 Pu s telescoped and the hammer is not actuated. The against a side wall of the shuttle and presses the shuttle or the spool supply box cannot be dampiston 5 into the push-rod 3, and the nose of the aged since according to the invention the forev pawl 9 is moved over the recess I0, since the stop wall of the box is so constructed as to be movll cannot abut against the pawl 9 and in conseable and a part of the spools in the supply box quence the hammer I5 is not actuated. There 55 the return-of the frame the hammer I5 -is again brought, by spring-action and the like, into its follows no introduction of a new spool and shuttle or spool cannot be damaged.

It now, by accident, a foreign body comes between the frame and the spool supply reservoir, or in the neighbourhood of the shuttle box and spool supply reservoir, then the fore-wall iii of the spool supply box is pressed inwards, since it is elastic androtatable, and the spools which are located behind the fore-wall are pressed on the track l9 backwards into the chamber 20 of the spool supply reservoir (Fig. 1 and Fig.. 5). As seen from Figure 1 three spools are located on a lower track 19 of the supply reservoir, while the majority of the spools is-located on an upper track 22 and reaches the lower track through a slanting or vertical channel 23. The spools on the lower track l9 are permanently pressed forwards by a push-rod 2i, which is secured at one end of a two-armed lever 24, the lever 24 being permanently pressed forwards under the action of a spring 25. Suitable slots 26 are provided in the spool supply casing,'thr ough which passes the push-rod 2|. The spool supply casing itself is pivoted on a shaft 21, which is mounted in a bracket 28 of the base plate 29, so that the spool supply box can be opened upwards in the direction of the arrow (Fig. 1). By means of a stopscrew 30 the exact distance between the end of the supply box and the shuttle box can be regulated. One side wall of the spool supply reservoir carries a bracket 3|, through which passes a shaft 32, on which again a stop 33 is mounted, which is connected with the fore-wall 18, so that the fore-wall I8 can rotate around the shaft 32. The stop 33 is arranged to strike against a spring pressed counter-stop 34, which is carried by an arm 35 and the contact of the stops is thus cushioned when the fore-wall I 8 slips back into its normal position after the removal of a foreign body.

Various constructional alterations can be made without exceeding the scope of the invention. The spool supply box, the base plate, as well as the separate stop devices can be altered in various manners as regards their outer forms and mutual arrangements.

Having now described my invention, what I claim'as new and desire to secure by Letters Pat'- ent is:-

1. In a device for automatically changing the weft spools of a mechanical weaving loom, a hammer, a two-part telescopic push-rod for actuating said hammer, a pawl on one part of said push-rod, a recess in the other part of said pushrod, and means for causing said pawl to enter said recess when the shuttle is correctly positioned for a spool-changing operation.

2. In or for a device for automatically changing the weft spools of a mechanical weaving loom, a hammer, a telescopic push-rod for actuating said hammer, a shuttle having a key-way, a keybolt on one part of the push-rod adapted to enter said key-way when the shuttle is correctly positioned for a spool-changing operation, and means rendered operative by the entry of said key-bolt the into said key way for permitting the said pushrod not-to telescope.

3. In a device for automatically changing the weft spools of a mechanical weaving loom, a hammer, a two-part telescopic push-rod for operating said hammer, a shuttle having a key way, a key bolt on the one part of said push-rod adapted to enter said key-way when the shuttle is correctly positioned for a spool-changing operation, a recess in one part of the said push-rod, a pawl on the other part of said push-rod, and means for causing said pawl to enter said recess when the key bolt enters said key-way.

4. In a device for automatically changing the weft spools of a mechanical weaving loom, a

,hammer, a telescopic push-rod for actuating said hammer, means for permitting said push-rod not to telescope when the shuttle is correctly positioned for a spool-changing operation, a spool supply reservoir, upper and lower tracks in said supply reservoir, a guide channel through which the spools fall from the upper track to the lower track, and a displacement chamber associated with the lower track.

5. In a device for automatically changing the weft spools of a mechanical weaving loom, a hammer, a telescopic push-rod for actuating said hammer, means for permitting said push-rod not to telescope when the shuttle is correctly positioned for a spool-changing operation, and a spool supply reservoir comprising a rotatable and resilient front wall.

6. In a device for automatically changing the weft spools of a mechanical weaving loom, a hammer, a telescopic push-rod for actuating said hammer, means for permitting said push-rod not to telescope when the shuttle is correctly positioned for a spool-changing operation, a shaft, and a rotatable spool supply reservoir axially immovable on said shaft.

7. In a device for automatically changing the weft spools of a mechanical weaving loom, a

hammer, a telescopic push-rod for actuating saidhammer, means for permitting said push-rod not to telescope when the shuttle is correctly positioned for a spool changing operation, a spool supply reservoir, and means for adjusting the position of said spool supply reservoir relative to the shuttle.

8. In or for a device for automatically changing the weft spools of a mechanical weaving loom,

a hammer, a telescopic push-rod for actuating said hammer, a shuttle having a key-way, a keybolt on one part of said push-rod adapted to enter said key-way, a recess in one part of said pushrod, a pawl on the other part of said push-rod, means for causing said pawl to enter said recess when said key-bolt enters said key-way, a rotatable spool supply reservoir comprising a rotatable and resilient front wall, upper and lower tracks in said reservoir, a guide channel through which the spools fall from the upper to the lower track, a displacement chamber associated with said lower track, and means for adjusting the position of said reservoir relative to said shuttle.

' RUDOLF HRDINA. 

